How to search across multi columns in the drop down window? set as default filter column can be multi columns?

Hi All, when we type a item No. in sales order subform list, we will got a drop down live above, and we can see there is a action set as default filter column, then we can search based on the default filter column, But sometimes our customers wants do it across multi-columns, if we can do that ? how ?

You have to click on the Advanced option and go to the page and then search on multiple fields, you cannot search on the lookup list by multiple columns you can search on the field by pressing Ctrl+F and your search is limited to the field only.

What do you mean by you cannot get the filter text?
You cannot do that with standard "Set as default filter column" - that only works in the Web Client. For the Windows client it will not work, as Peik writes in his blog post. You need to "program" this behavior.

Thanks Erik. Yes , I can not get the filter text . As I wrote the code here: opnepagetrigger， And I even can not set the descending for the column. Below is my code, if there is any error, I hope you could point out. Thanks in advance.

You need to set the filters before you can get them. Also it's better to create a function (i.e. UpdatePage or InitPage and put your code there. Easier to maintain in the long run. Especially if you change this in a standard page. The OnOpenPage trigger is only called once on-open, so you might need to call the same filter.
Which version of NAV is it? Something about not being able to sort on flowfields if older than 2016.
Have you tried ASCENDING(TRUE);